China cold storage solution provider
Autumn is the peak season for persimmons — juicy, sweet, and rich in nutrients. Persimmons are not only delicious but also have high medicinal value, offering health benefits such as moistening the lungs, reducing phlegm, lowering blood pressure, and aiding digestion. However, once fully ripened, persimmons soften quickly at room temperature, making them difficult to store for long periods.
So, how can farmers preserve persimmons after harvest? Below are several common storage methods, along with the best solution for long-term preservation.
Pile of Persimmon.Full in frame shot.close-up shot.
1. Indoor Stacking Storage
In northern regions, persimmons are often stored indoors in cool, dry, and well-ventilated rooms or caves. A 15–20 cm layer of straw is spread on the ground, and persimmons are gently arranged in 3–5 layers. During the initial stage, proper ventilation is crucial to release heat. This traditional method can keep persimmons fresh until around the Lunar New Year.
2. Natural Freezing Method
In colder northern areas, persimmons can be stored outdoors below 0°C, allowing them to freeze naturally — which also helps remove astringency.
A common method involves digging trenches about 33 cm deep and wide, laying 7–10 cm of straw at the bottom, and stacking 5–6 layers of persimmons after frost has set in. Cover them with 30–60 cm of straw and then seal the trenches with soil after mid-winter. This method preserves persimmons until early spring.
3. Quick Freezing Storage (-25°C)
For commercial-scale preservation, persimmons can be frozen in quick-freezing cold storage at temperatures below -25°C for 24–48 hours. After freezing, they are transferred to long-term storage at -10°C.
This process maintains the fruit’s color, texture, and flavor while significantly extending shelf life. However, once removed from the cold room, persimmons must be sold quickly before they soften and discolor.
4. Controlled Atmosphere (CA) Cold Storage — The Best Preservation Method
The CA cold room is the most effective and scientifically proven way to preserve persimmons for extended periods. Before storage, the fruit should be pre-cooled to enhance the cooling system’s efficiency and reduce respiration.
The optimal storage temperature is -1°C, with a relative humidity of 85–90%. Oxygen and carbon dioxide concentrations should be maintained at 3–5% O₂ and 8% CO₂. Under these conditions, persimmons can remain fresh for 3–4 months, retaining their natural flavor, texture, and nutrients.
To learn more about how this technology preserves fruits and vegetables, see our guide on [Controlled Atmosphere Storage: An Advanced Solution for Fruit & Vegetable Preservation]
👉 For reference, you can also explore our fruit and vegetable cold storage projects to see real-world examples of efficient cold chain preservation systems.